linux-kernel - Re: [PATCH 1/1] tools build: Don't assume libtracefs-devel is always available

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Message-ID: <CAP4=nvSekQeTZvxLdajCp8FH2Xva1eN4=a8XhXODR9TMHKK3+w@mail.gmail.com>
Date: Thu, 2 Oct 2025 16:13:09 +0200
From: Tomas Glozar <tglozar@...hat.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>, Ian Rogers <irogers@...gle.com>, 
	Adrian Hunter <adrian.hunter@...el.com>, Gabriele Monaco <gmonaco@...hat.com>, 
	James Clark <james.clark@...aro.org>, Jiri Olsa <jolsa@...nel.org>, 
	Kan Liang <kan.liang@...ux.intel.com>, Steven Rostedt <rostedt@...dmis.org>, 
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, linux-perf-users@...r.kernel.org
Subject: Re: [PATCH 1/1] tools build: Don't assume libtracefs-devel is always available

čt 2. 10. 2025 v 15:05 odesílatel Arnaldo Carvalho de Melo
<acme@...nel.org> napsal:
>
> perf doesn't use libtracefs and so it doesn't make sense to assume it is
> always available when building test-all.bin, defeating the feature check
> speedup it provides.
>
> The other tools/build/ users such as rtla, rv, etc call $(feature_check
> libtracefs) to check its availability instead of using the test-all.bin
> mechanism, stopping the build and asking for libtracefs-devel to be
> installed.
>
> Noticed after applying Ian Roger's removal unused libtracefs
> configuration in tools/perf/.
>
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> Cc: Gabriele Monaco <gmonaco@...hat.com>
> Cc: Ian Rogers <irogers@...gle.com>
> Cc: James Clark <james.clark@...aro.org>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Kan Liang <kan.liang@...ux.intel.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Cc: Steven Rostedt <rostedt@...dmis.org>
> Cc: Tomas Glozar <tglozar@...hat.com>
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

Acked-by: Tomas Glozar <tglozar@...hat.com>

Perhaps it would also make sense to clarify in a comment that
test-all.c is to speed up perf build rather than rv, rtla etc. (which
don't use most of the dependencies listed there)?

Tomas